Hatch-cover for ships.



A. HOGG.

"HATCH COVER FOR SHIPS.

APPLICATION FILED JUNE 16,1915.

1, 171 ,72 1 Patented Feb. 15, 1916.

3 SHEETS-SHEET 1- ATTY THE COLUMBIA FLANOCIRAPH Cov, WASHINGTON D c 3 SHEETS-SHEET 2- I A T T Y Patented Feb. 15, 1916.

/V 9: /V TORY, Mm 7%77W% A HOGG HATCH COVER FOR SHIPS.

APPLICATION FILED JUNEIIG, 1915.

A. HOGG.

HATCH COVER FOR SHIPS.

APPLICATION FILED JUNE 16, 1915.

1,171,721. Patented Feb. 15,1916.

- 3 SHEETS-SHEET 3- 4Lw L4MA JM UNITED STATES. PATENT ARCHIBALD HOGG, or'nEwcAs'rLE-UPomTYNE, 'ENeLANn.

HATCH-COVER FOR SHIPS.

Application filed June 16, 1915. Seria1No.34,393.

To allwiiom may concern: V

Be it known that I, ARCHIBALD Hoes, a subject of the King of Great Britain and Ireland,residing at 80 Welbeck roadwest, alker, in the city and county of Newcastle-upon-Tyne, England, have invented new and useful Improvements in I-Iatch-Covers for Ships, of which thefollowing is'a specification. j

r This invention relates to hatch, covers for ships and other floating structures, and has for its object to provide an improved construction thereof. v

A hatch cover'made in accordance with this invention is composed of plates shaped and connected together to form corrugations and strengthened and supported by one or more stifi eners arranged transversely of the corrugations of the plating. -The corrugations of the plating may run in a direction fore and aft of the ship, or in a direction transverse of the ship, but in all cases the stiflieners are arranged at right angles to the corrugations or as nearly so as is compatible with the shape of the hatchway. The stilteners are shaped tofit the corrugated plating and are attached directly thereto. A single corrugation be provided in each hatch cover, or two, three, Or more corrugations or parts of corrugationsinay be provided. The corrugations may beof any suitable depth, size and pitch, and may be arranged on a level or fiat plane or in the form of an arch. The widely-spaced stiffeners may be arranged either above or below'the plating of the cover. The cover will be supported by the hatch coamings or by the deck as usual, and said coamings may be shaped, if desired, to fit the corrugations at the ends or sides, or end stiffeners may be provided to enter the concavities of the plat.- ing and so built up as to provide a plane or other suitable surface where the cover bears on the coamings or deck, these end stifieners being fitted so as to retain and support the curves or shapes of the corrugated plating, said shaped coamingsor end stiiieners closing the ends of the cover. transverse corrugations thereof. r

In use the usual canvas covers or tarpaulins may be arranged over the corrugated cover, or a tarpaulin curtain may be fitted around the edges of the corrugated cover, watertightness in either case being obtained by the usual battens, cleats or the like; or

of the Specification of Letters Patent. "Patented. Feb. 15,

the tarpaulins may be dispensed with and watertightness obtained by means of packing or other methods; or the-covers .may simplyirest in rest pieces on the coamingor on the deck Without any tarpaulin or other method of making the cover watertight. .The hatch cover may be adapted to be liftedin one piece clear away or turned up on hinges as awhole, or may be formed in any number 7 clear away or turned up onhinges sepaof partsor portions which maylbe-litted rately. If desired the corrugations may ex .tendthefull length of the hatch with no other 'stiifeners than thoseattaehed at the ends. In cases wherethe cover is divided longitudinally of the corrugations, the end plates at the joints and the end stiifeners of the cover may be the only stifleners retaining and supporting thecorrugated plating. The accompanying drawings illustrate several; constructions of hatchway, covers in accordance with my invention. 1

In the drawings Figures 1, 2 and 3illustrate a hatch cover having one central stifiener placed on the upper sideof thecover and two corrugations in the cover,,Fig. 1 be- P 1 ing a section on. the line VV.in Fig. 3 looking to the left, F ig-.2 a section on the same line looking to the right, and'Fig. 3 .a section at right angles to Figs. 1 and 2; F igst and 5 illustrate a hatchcover'having one central stiffener placed on the underside of the coverand two Jcorrugations'in' :the

and Fig. 5 a similar'view tojFig. 3; Figs.

cover,- Fi 4 being aIsimilar view to;Fig.zl, -.90

6, 7 and 8 illustrate a -l 1atch'coverin twoparts, Fig. 6 be ng a plan view, Fig.7 a sectlonon the line /Vj-WV inFig. 6 ,and Fig. 8 V

a section on the line X+X in F ig.,-6 ;'Figs.-f 9, l0- and 11 illustrate a hatch. cover in. four parts, F ig; ,9 being aplan view FigLIO. a

section on the line YY in Fig. 9, and Fig. 11 a-section on the line Z-Z. in Fig. 9;, and Fig. 12 illustrates a modified form of corrua on- Referring to-the drawings, the plating a of the hatch cover is shaped to form corrugations as shown, and I" employin combi- ;nation therewith widely-spaced stifl'eners b and end stifieners a which close the ends of the cover transverse to the corrugations 1 thereof. The corrugations of the plating" may be of curved contour as shown in Figs. 1-11 of the drawings, or they may be of straight-line contour (for example, as

shown in Fig. 12) or of any other suitable contour, and the plates may be lapped. as shown and where shown or at any other part of the curve, or they may be butted and strapped. The edges of the plating of the cover at the coamings or rests d may be stiffened by angle bars 6 or other suit-. able section bar, flat or otherwise, or these bars may be dispensedi with altogether. The corrugations of the cover may be fiat-1 tened down at the ends of the cover toclose the ends transverse of the corrugations as indicated in dotted lines at f in Fig. 3 so as to form continuous flat or level portions where the ends of the cover bear on the coamings and avoid the necessity of fitting shaped: end stifieners c.

The corrugations of the-plating a. may run longitudinally of the hatchway as shown, or they may run transversely of the hatchway, but in all cases the stiifeners b, 0 will be arranged at right angles to the corrugations or as nearly so as is compatible with the shape of the hatchway. 'The stiff eners b, a are shaped to fit the corrugated plating a and are connected directly thereto y angle bars 9 which are also shaped to the corrugations of the plating." The stifieners are spaced widely apart, the distance between same depending in each case upon the dimensions of the hatch cover. By way of example in a hatch cover 20 feet long by 33 feet wide, the 'stifieners will usually be arranged about eleven feet apart, though if desired only one stiffener may be arranged between the end stifieners or there may be two or more' intermediate stiffeners. The stifieners will usually be fitted across the shorter dimension of the cover and the corrugations of the plating will usually fol-. low the longer dimension of the cover, though this arrangement might be reversed. The stifieners may be arranged either above the plating as shownin Figs. 1, 2' and 3, or below the plating as shown in Figs. 4 and 5. WVhen the stifieners are fitted on the upper side of the cover as shown in Figs. 1, 2 and 3 drain holes such as h (Fig. 1) may be provided in the stiifeners to al-. low any waten'rto drain off the top of the cover. When the stiffeners are arrangedon the underside of the cover "as shown in Figs. Land 5, end pieces such as shown at 7' (Fig. 4:) may be fitted on the upper side of the cover immediately above the ends of they stiffeners b, o for the purpose of strength- Gopiesof this patent may be obtained for five cents each, by addressing the Commissioner of latents,

eningthe ends of the cover to give proper support thereto.

In cases wherethe .cover is made in; two or more parts as illustrated in Figs. 6 to 11, separate supporting beams is may be fitted, these beams being ordinary hatch beams secured to the coamingd as usual and in no way connected to the cover.

The hatch covers illustrated in Figs. 1 to 5 of the drawings are. hinged at: m, the hinges being arranged at the ends ofthe stiifeners b and c. In some cases hinges may be-fitted atgboth ends ofthe stiifeners so that the covers may be turned up on either side as desired, the pivot pins of the hingesat one side. of the cover being removed when the cover isto be turned upon the hinges at the other side. If desired, however, the hingesmaybe dispensed with and the covers adapted to be lifted clear away from the hatchways. Figs. 6 toll are intended to be lifted clear away.

In my improved construction of hatch covers the employment of corrugated plating enables me to dispense with the customary closely-spaced stiffeners which are required and necessary for covers constructed of plane or flat plating and I thereby save weight of steel, and, in addition ;to

this saving of weight, I am enabled to use thinner plating than. customary without de- The covers of tracting from the strength of the cover,

and Ilthus greatly reduce the weight of the cover and the cost of same, which saving in weight will add to the-carrying capacity of the ship and reduce the appliances and:

labor required for lifting the covers. I

What I claim and desire to secureby Let- V ters Patent is In hatchwaycovers' for, ships, the combi- I nation ofplates shaped and connected together to form corrugati0ns,:and stiffeners arranged transversely of the corrugations of said plates, said sti'fi'eners extending into the corrugations of said 'platesand being attached thereto and means for closing the ends of the=covers transverse of the corru-a Washington, D. G. 

